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Max Kazantsev 5cbed866a3 [SCEV] Use depth limit instead of local cache for SExt and ZExt 
In rL300494 there was an attempt to deal with excessive compile time on
invocations of getSign/ZeroExtExpr using local caching. This approach only
helps if we request the same SCEV multiple times throughout recursion. But
in the bug PR33431 we see a case where we request different values all the time,
so caching does not help and the size of the cache grows enormously.

In this patch we remove the local cache for this methods and add the recursion
depth limit instead, as we do for arithmetics. This gives us a guarantee that the
invocation sequence is limited and reasonably short.

Differential Revision: https://reviews.llvm.org/D34273

llvm-svn: 306785
2017-06-30 05:04:09 +00:00
bindings [NFC] Remove multiple semicolons 2017-06-28 23:15:16 +00:00
cmake TableGen.cmake: Use DEPFILE for Ninja Generator with CMake>=3.7. 2017-06-21 22:04:07 +00:00
docs Add a C API section to the release notes. 2017-06-30 01:17:45 +00:00
examples [ORC] Re-apply r306166 and r306168 with fix for regression test. 2017-06-23 23:25:28 +00:00
include [SCEV] Use depth limit instead of local cache for SExt and ZExt 2017-06-30 05:04:09 +00:00
lib [SCEV] Use depth limit instead of local cache for SExt and ZExt 2017-06-30 05:04:09 +00:00
projects Add temporary workaround to allow in-tree libc++ builds on Windows 2017-05-11 01:44:30 +00:00
resources In MSVC builds embed a VERSIONINFO resource in our exe and DLL files. 2015-06-12 15:58:29 +00:00
runtimes [CMake][runtimes] Add install target for runtimes builtins 2017-06-02 19:38:11 +00:00
test [SCEV] Use depth limit instead of local cache for SExt and ZExt 2017-06-30 05:04:09 +00:00
tools Change the type of Undecorated to unique_ptr<char[]> since we're looking at a null terminated string and not a single character. 2017-06-30 01:45:56 +00:00
unittests Try to appease a buildbot. 2017-06-30 04:04:44 +00:00
utils Remove inline keyword from inline classof methods 2017-06-29 19:35:17 +00:00
.arcconfig project_id is from another era in phabricator land and does not provide any value. 2016-09-27 15:47:29 +00:00
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.clang-tidy .clang-tidy: correct style name is 'camelBack' not 'lowerCase'. 2016-09-13 19:04:26 +00:00
.gitignore gitignore: Ignore .vs folder (VS2017 config files) 2017-04-08 00:16:58 +00:00
CMakeLists.txt [Solaris] replace Solaris.h hack with a set of better hacks 2017-06-22 13:18:46 +00:00
CODE_OWNERS.TXT [CODE_OWNERS] Add my other email address since my commits are now using my work email. 2017-06-24 03:26:01 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT Another test commit 2017-06-24 21:04:32 +00:00
LICENSE.TXT Bump year to 2017 in LICENSE.txt 2017-01-12 18:02:42 +00:00
llvm.spec.in [Sparc] Implement i64 load/store support for 32-bit sparc. 2015-08-10 19:11:39 +00:00
LLVMBuild.txt
README.txt Test commit. Added a blank line. 2017-03-06 20:45:33 +00:00
RELEASE_TESTERS.TXT Update the release tester for MIPS. NFC. 2017-01-17 11:00:28 +00:00

README.txt 

Low Level Virtual Machine (LLVM)
================================

This directory and its subdirectories contain source code for LLVM,
a toolkit for the construction of highly optimized compilers,
optimizers, and runtime environments.

LLVM is open source software. You may freely distribute it under the terms of
the license agreement found in LICENSE.txt.

Please see the documentation provided in docs/ for further
assistance with LLVM, and in particular docs/GettingStarted.rst for getting
started with LLVM and docs/README.txt for an overview of LLVM's
documentation setup.

If you are writing a package for LLVM, see docs/Packaging.rst for our
suggestions.